🧠 Hunt-Hess Grade (Subarachnoid Haemorrhage)
Grade clinical severity of aneurysmal subarachnoid haemorrhage (Hunt-Hess).
Clinical takeaway
Predicts surgical risk and outcome.
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When to use
Stratify prognosis and surgical risk in SAH.
How it works
Grade I (asymptomatic/mild headache) to V (deep coma, decerebrate). Higher grades carry higher mortality.
Key points
- Predicts surgical risk and outcome.
- Grades IV–V indicate poor prognosis.
- Often reported alongside the WFNS grade.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Grade | I — Asymptomatic or mild headache |
|---|
→Hunt-Hess1/5
- Note：Higher grades correlate with worse survival and outcome.
| Grade | V — Coma, decerebrate posturing |
|---|
→Hunt-Hess5/5
- Note：Higher grades correlate with worse survival and outcome.
Frequently asked questions
- What is Hunt-Hess Grade (Subarachnoid Haemorrhage)?
- Grade clinical severity of aneurysmal subarachnoid haemorrhage (Hunt-Hess).
- How is Hunt-Hess Grade (Subarachnoid Haemorrhage) calculated? What is the core formula?
- Grade I (asymptomatic/mild headache) to V (deep coma, decerebrate). Higher grades carry higher mortality.
- When is Hunt-Hess Grade (Subarachnoid Haemorrhage) used?
- Stratify prognosis and surgical risk in SAH.
- What are the key clinical points for Hunt-Hess Grade (Subarachnoid Haemorrhage)?
- Predicts surgical risk and outcome. Grades IV–V indicate poor prognosis. Often reported alongside the WFNS grade.
- What are the limits and cautions when using Hunt-Hess Grade (Subarachnoid Haemorrhage)?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is Hunt-Hess Grade (Subarachnoid Haemorrhage) calculated in practice? Can you show a worked example?
- Inputs: Grade I — Asymptomatic or mild headache → Result: Hunt-Hess 1 /5（Note: Higher grades correlate with worse survival and outcome.） Inputs: Grade V — Coma, decerebrate posturing → Result: Hunt-Hess 5 /5（Note: Higher grades correlate with worse survival and outcome.）